1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*
41 * this file contains the I/O handling and the exchange of
42 * edit characters. This connection itself is established in ctl.c
43 */
44
45 #include "talk.h"
46 #include <stdio.h>
47 #include <errno.h>
48 #include <sys/time.h>
49 #include <sys/filio.h>
50 #include <libintl.h>
51
52 #define A_LONG_TIME 10000000
53 #define STDIN_MASK (1<<fileno(stdin)) /* the bit mask for standard input */
54
55 /*
56 * The routine to do the actual talking
57 */
58
59 void
talk()60 talk()
61 {
62 int read_template, sockt_mask;
63 int read_set, nb;
64 char buf[BUFSIZ];
65 struct timeval wait;
66
67 message(gettext("Connection established"));
68 beep(); beep(); beep();
69 current_line = 0;
70
71 sockt_mask = (1<<sockt);
72
73 /*
74 * wait on both the other process (sockt_mask) and
75 * standard input ( STDIN_MASK )
76 */
77
78 read_template = sockt_mask | STDIN_MASK;
79
80 forever {
81
82 read_set = read_template;
83
84 wait.tv_sec = A_LONG_TIME;
85 wait.tv_usec = 0;
86
87 nb = select(32, (fd_set *)&read_set, 0, 0, &wait);
88
89 if (nb <= 0) {
90
91 /* We may be returning from an interrupt handler */
92
93 if (errno == EINTR) {
94 read_set = read_template;
95 continue;
96 } else {
97 /* panic, we don't know what happened */
98 p_error(
99 gettext("Unexpected error from select"));
100 quit();
101 }
102 }
103
104 if (read_set & sockt_mask) {
105
106 /* There is data on sockt */
107 nb = read(sockt, buf, sizeof (buf));
108
109 if (nb <= 0) {
110 message(gettext("Connection closed. Exiting"));
111 pause(); /* wait for Ctrl-C */
112 quit();
113 } else {
114 display(&rem_win, buf, nb);
115 }
116 }
117
118 if (read_set & STDIN_MASK) {
119
120 /*
121 * we can't make the tty non_blocking, because
122 * curses's output routines would screw up
123 */
124
125 ioctl(0, FIONREAD, (struct sgttyb *)&nb);
126 nb = read(0, buf, nb);
127 display(&my_win, buf, nb);
128 write(sockt, buf, nb);
129
130 /*
131 * We might lose data here because sockt is
132 * non-blocking
133 */
134 }
135 }
136 }
137
138
139 /*
140 * p_error prints the system error message on the standard location
141 * on the screen and then exits. (i.e. a curses version of perror)
142 */
143
144 void
p_error(char * string)145 p_error(char *string)
146 {
147 wmove(my_win.x_win, current_line%my_win.x_nlines, 0);
148 wprintw(my_win.x_win, "[%s : %s]\n", string, strerror(errno));
149 wrefresh(my_win.x_win);
150 move(LINES-1, 0);
151 refresh();
152 quit();
153 }
154
155 /* display string in the standard location */
156
157 void
message(char * string)158 message(char *string)
159 {
160 wmove(my_win.x_win, current_line%my_win.x_nlines, 0);
161 wprintw(my_win.x_win, "[%s]\n", string);
162 wrefresh(my_win.x_win);
163 }
164